[Gradient_task_force] Cavity maintenance opportunities

[Tom Powers]

I looked at the 1L10 trips from the first of the year.  Cavity 2 has 
about 5 or 6 electronic quenches which is probably arcing on the cavity 
side of the cold window.  Other than that there were mostly microphonics 
based trips.  Probably related to tuners moving.  On a few trips were 
because a motor was oscillating.

None were quenches that looked like multipacting.

T

On 2/27/2024 12:59 PM, Mike McCaughan wrote:
> C75 limitations attached. Cavity 1 is at 11.8 as it encountered a beam 
> line vacuum fault and quench repeatably at 12.3 MV/m. Please keep and 
> eye on beam line and waveguide vacuum if you attempt to process that 
> cavity. Cavity 8 also looks like it encounters beam line vacuum faults 
> at ~15.5 MV/m.
> Mike
>
>
>
> ------------------------------------------------------------------------
> *From:* Gradient_task_force <gradient_task_force-bounces at jlab.org> on 
> behalf of Tom Powers <powers at jlab.org>
> *Sent:* Tuesday, February 27, 2024 12:49 PM
> *To:* gradient_task_force at jlab.org <gradient_task_force at jlab.org>; 
> Harshani Senevirathne <iresha at jlab.org>
> *Subject:* Re: [Gradient_task_force] Cavity maintenance opportunities
> 2, 5 and 8 had 100 ms Quenches back in Sept.  That is an indication of a
> multipactor.   They should be pulsed processed.
>
> I don't know why cavity 1 is turned down so low.
>
> I will check recent data for electronic quenches in 1L05 1 and 8 and 100
> ms quenches everywhere else in 1L05 later this afternoon.
>
> If you are processing 1 or 8 and the adjacent vacuum valve closes due to
> an outburst you should stop doing that cavity so that you lower the risk
> of the valve shedding particles.
>
> Tom
>
> On 2/27/2024 12:09 PM, Harshani Senevirathne wrote:
> > 1L05-1 and 8.
>
> _______________________________________________
> Gradient_task_force mailing list
> Gradient_task_force at jlab.org
> https://mailman.jlab.org/mailman/listinfo/gradient_task_force 
> <https://mailman.jlab.org/mailman/listinfo/gradient_task_force>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/gradient_task_force/attachments/20240227/4b2be110/attachment.html>